Yes off course, but that would mean more local expensive storage needed. Any change in behavior with v8? Otherwise this feature, decompress before storing to VTL tape (on dedupe unit) would sound like a nice feature enhancement.

We had been using Windows dedupe for the initial backup target but found that was a bit of a struggle to manage so we now use veeam's native compression dedupe. We use a Quadstor VTL appliance which uses dedupe as a monthly "Offline" copy. Problem is the backup copy is hitting this compressed/deduped so we are struggling to get decent dedupe ratios.

6 copies of very similar data and we are only getting 1.8:1. I suspect if the data was not compressed we would get 4:1 or higher

mc2 wrote:Just wondering if this functionality will be available in 9.5?

We had been using Windows dedupe for the initial backup target but found that was a bit of a struggle to manage so we now use veeam's native compression dedupe. We use a Quadstor VTL appliance which uses dedupe as a monthly "Offline" copy. Problem is the backup copy is hitting this compressed/deduped so we are struggling to get decent dedupe ratios.

6 copies of very similar data and we are only getting 1.8:1. I suspect if the data was not compressed we would get 4:1 or higher

From quadstor here. Do you see any improvement in the ratios by turning off compression for the source backups ?

For effective dedupe you would need compression to be turned off at the source. The ratios indicates very little deduplication. Also the VTL by default uses a 256k block size for hash computation which is on the higher side for VM backups and requires some fine tuning. You could contact me off list or contact us (the email id is on the website) and we can check if anything needs to be done on the VTL side